/*
 * ESTO ES UNA LICENCIA DE PRUEBA
 * EL CODIGO ES DE LIBRE ACCESO PERO ACUERDESE QUE ESTA BAJO LICENCIA
 */
package org.japo.java.matisse.samples;

import java.io.File;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author (c) 2014 - TUTORIALES DE NETBEANS Y JAVA
 */
public class EjecucionUnicaAsistida extends javax.swing.JFrame {

    /**
     * Creates new form EjecucionUnicaAsistida
     */
    public EjecucionUnicaAsistida() throws IOException {
        iniciarAnterior();
        initComponents();
        iniciarPosterior();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        addWindowListener(new java.awt.event.WindowAdapter() {
            public void windowClosing(java.awt.event.WindowEvent evt) {
                formWindowClosing(evt);
            }
            public void windowOpened(java.awt.event.WindowEvent evt) {
                formWindowOpened(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 400, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 300, Short.MAX_VALUE)
        );

        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void formWindowOpened(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_formWindowOpened


    }//GEN-LAST:event_formWindowOpened

    private void formWindowClosing(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_formWindowClosing
        try {
            desactivarInstancia();
        } catch (IOException ex) {
            terminarPrograma();
        }
    }

    private void iniciarAnterior() throws IOException {
        try {
            activarInstancia();
        } catch (IOException ex) {
            terminarPrograma();
        }
    }

    private void iniciarPosterior() {


    }//GEN-LAST:event_formWindowClosing

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(EjecucionUnicaAsistida.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(EjecucionUnicaAsistida.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(EjecucionUnicaAsistida.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(EjecucionUnicaAsistida.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    new EjecucionUnicaAsistida().setVisible(true);
                } catch (IOException ex) {
                    Logger.getLogger(EjecucionUnicaAsistida.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        });
    }

    // Variables declaration - do not modify//GEN-BEGIN:variables
    // End of variables declaration//GEN-END:variables
    private void activarInstancia() throws IOException {
        String F_BLOQUEO = "logo.jpg";
        //Crea un objeto File a partir del nombre del fichero
        File f = new File(F_BLOQUEO);

        //Comprueba si el fichero fisico existe o no
        boolean existeOK = f.exists();

        //Tramita el resultado de la comprobacion
        if (!existeOK) {
            f.createNewFile();
        } else {
            throw new IOException("Ya existe una copia en ejecucion");
        }
    }

    private void terminarPrograma() {

        //oCULTA LA VENTANA
        setVisible(false);

        //Libera recursos graficos
        dispose();

        //Termina el hilo principal
        System.exit(0);

    }

    private void desactivarInstancia() throws IOException {

        String F_BLOQUEO = "logo.jpg";
        File f = new File(F_BLOQUEO);

        boolean existeOK = f.exists();

        if (existeOK) {
            f.delete();
        } else {
            throw new IOException("Hay un problema en la anulacion del bloqueo");
        }
    }
}
